Bitcoin 50/50 is a lottery for Bitcoins. Every night at midnight Pacific Time, minimum 5 BTC, or 50% of the day's total entries (whichever is highest), is given away to one of the participants ("ticket buyers").

I spoke to the creator and he seems to be honest; he's also quick with responses. The minimum purchase price is 0.25 BTC, which isn't overly costly.

I'm just doing the creator a favour and trying to help get the word out.